JP2017093900A - Method for producing plate denture - Google Patents
Method for producing plate denture Download PDFInfo
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- JP2017093900A JP2017093900A JP2015230735A JP2015230735A JP2017093900A JP 2017093900 A JP2017093900 A JP 2017093900A JP 2015230735 A JP2015230735 A JP 2015230735A JP 2015230735 A JP2015230735 A JP 2015230735A JP 2017093900 A JP2017093900 A JP 2017093900A
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- artificial tooth
- denture
- denture base
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Landscapes
- Dental Prosthetics (AREA)
Abstract
Description
本発明は、有床義歯の製造方法に関する。 The present invention relates to a method for producing a plate denture.
近年、ＣＡＤ／ＣＡＭ（Computer Aided Design and Computer Aided Manufacturing）システムを利用した義歯床及び有床義歯の製造が提案されている。義歯床及び有床義歯の製造においてＣＡＤ／ＣＡＭシステムを導入することにより、作業の効率化が図られ、品質のバラツキを抑えることが可能となるといったメリットがある。 In recent years, the manufacture of denture bases and base dentures using a CAD / CAM (Computer Aided Design and Computer Aided Manufacturing) system has been proposed. Introducing a CAD / CAM system in the manufacture of denture bases and denture bases has the advantage that work efficiency can be improved and variation in quality can be suppressed.
また、ＣＡＤ／ＣＡＭシステムを利用して有床義歯を作製する際、ＣＡＤ／ＣＡＭシステムにより切削して義歯床を作製し、作製された義歯床に人工歯を接着する工程が存在する。このとき、義歯床のソケット部に接着剤として歯科用義歯床用レジン（以下、単に「レジン」とも称する。）を滴下し、手作業で人工歯をソケット部にはめた後にレジンを重合させて接着する。接着剤として用いられるレジンは、ポリマー粉とモノマー液とを混合させてなり、混合直後は低粘度であるが、室温にて時間経過とともに粘度が高くなり固まるものである。 Moreover, when producing a denture using a CAD / CAM system, there is a step of cutting the CAD / CAM system to produce a denture base and bonding an artificial tooth to the produced denture base. At this time, a dental denture base resin (hereinafter simply referred to as “resin”) is dropped as an adhesive on the socket portion of the denture base, and the resin is polymerized after artificial teeth are manually fitted on the socket portion. Glue. A resin used as an adhesive is obtained by mixing polymer powder and a monomer liquid, and has a low viscosity immediately after mixing, but increases in viscosity and hardens at room temperature.
義歯床に人工歯を接着する技術としては、種々の方法が開示されている。
例えば、レジン床の表面に形成された人工歯配列用の凹部が表面改質され、表面改質された凹部に接着剤を介してレジン歯を接着すること、及び、接着剤（レジン）として自己接着タイプのスーパーボンドを使用することが開示されている（例えば、特許文献１を参照）。
また、人工歯の基底面にプライマー処理を施した後、プライマー処理された面に即時重合レジンを塗布して接着層を形成し、人工歯と床とを接着することが開示されている（例えば、特許文献２を参照）。
Various techniques have been disclosed as techniques for adhering artificial teeth to a denture base.
For example, a concave portion for artificial tooth arrangement formed on the surface of the resin floor is surface-modified, and the resin teeth are bonded to the surface-modified concave portion via an adhesive, and self as an adhesive (resin). The use of an adhesive type super bond is disclosed (for example, see Patent Document 1).
Further, it is disclosed that after the primer treatment is performed on the base surface of the artificial tooth, an immediate polymerization resin is applied to the primer-treated surface to form an adhesive layer, and the artificial tooth and the floor are bonded (for example, , See Patent Document 2).
特許文献１、２に記載されているレジンは、混合直後は低粘度であるが、時間経過とともに粘度が高くなるため、ソケット部にレジンを滴下して人工歯をソケット部に配置する際にレジンが重合により徐々に硬化してしまい、取り扱いが容易ではない。 The resins described in Patent Documents 1 and 2 have a low viscosity immediately after mixing, but the viscosity increases with time. Therefore, when the resin is dropped on the socket part and the artificial teeth are placed on the socket part, the resin Is gradually cured by polymerization and is not easy to handle.
さらに、レジンの重合によりソケット部に配置された人工歯が固定されると、人工歯を動かすことができなくなり、また、固定された人工歯を取り外して位置調整を試みると義歯床が損傷してしまう。そのため、人工歯をソケット部に配置して時間が経過すると人工歯の位置修正又は微調整ができないという問題がある。 Furthermore, if the artificial tooth placed in the socket is fixed due to polymerization of the resin, the artificial tooth cannot be moved, and if the fixed artificial tooth is removed and the position adjustment is attempted, the denture base is damaged. End up. Therefore, there is a problem that the position of the artificial tooth cannot be corrected or fine-tuned when time passes after the artificial tooth is arranged in the socket portion.
本発明は、上記問題に鑑みてなされてものであり、人工歯を義歯床のソケット部に配置する際に人工歯の位置修正又は微調整が可能である有床義歯の製造方法を提供することを目的とする。 This invention is made in view of the said problem, and when providing an artificial tooth in the socket part of a denture base, the position correction or fine adjustment of an artificial tooth is possible and the manufacturing method of a base denture is provided. With the goal.
前記課題を達成するための具体的手段は、以下の通りである。
＜１＞ 人工歯を義歯床に歯科用複合レジンを用いて接着する段階を有する接着工程を含む有床義歯の製造方法。
＜２＞ 前記接着工程は、接着された前記人工歯を前記義歯床にアクリル系レジンを用いて本接着する段階を更に有する＜１＞に記載の有床義歯の製造方法。
＜３＞ 前記歯科用複合レジンは、光重合性のコンポジットレジンである＜１＞又は＜２＞に記載の有床義歯の製造方法。
＜４＞ 前記接着工程の前に、ＣＡＤ／ＣＡＭシステムにより前記義歯床を作製する作製工程を更に含む＜１＞〜＜３＞のいずれか１つに記載の有床義歯の製造方法。
Specific means for achieving the above object are as follows.
<1> A method for producing a denture with a denture, which includes an adhesion step including adhering an artificial tooth to a denture base using a dental composite resin.
<2> The method for manufacturing a denture according to <1>, wherein the bonding step further includes a step of performing main bonding of the bonded artificial tooth to the denture base using an acrylic resin.
<3> The method for producing a denture according to <1> or <2>, wherein the dental composite resin is a photopolymerizable composite resin.
<4> The method for producing a denture according to any one of <1> to <3>, further including a production step of producing the denture base by a CAD / CAM system before the bonding step.
本発明によれば、人工歯を義歯床のソケット部に配置する際に人工歯の位置修正又は微調整が可能である有床義歯の製造方法を提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, when arrange | positioning an artificial tooth in the socket part of a denture base, the position correction or fine adjustment of an artificial tooth can be provided.
＜有床義歯の製造方法＞
以下に、本発明に係る有床義歯の製造方法の一実施形態について説明する。
本発明の一実施形態に係る有床義歯の製造方法は、人工歯を義歯床に歯科用複合レジンを用いて接着する段階を有する接着工程を含む。また、本実施形態に係る有床義歯の製造方法では、接着工程は、接着された人工歯を義歯床にアクリル系レジンを用いて本接着する段階を更に有することが好ましい。
<Manufacturing method of plate denture>
Below, one Embodiment of the manufacturing method of the denture based on this invention is described.
The manufacturing method of the denture based on one Embodiment of this invention includes the adhesion | attachment process which has the step which adhere | attaches an artificial tooth on a denture base using a dental composite resin. Moreover, in the manufacturing method of the denture based on this embodiment, it is preferable that an adhesion | attachment process further has the step which carries out the main adhesion | attachment of the bonded artificial tooth to a denture base using an acrylic resin.
本実施形態に係る有床義歯の製造方法では、歯科用複合レジンを用いて人工歯を義歯床に接着する。これにより、人工歯を義歯床のソケット部に配置する際に人工歯の位置修正又は微調整が可能となる。なお、ソケット部とは、義歯床における人工歯が配置される窪み部分である。 In the method for manufacturing a denture according to this embodiment, an artificial tooth is bonded to the denture base using a dental composite resin. This makes it possible to correct or finely adjust the position of the artificial tooth when the artificial tooth is placed in the socket part of the denture base. In addition, a socket part is a hollow part by which the artificial tooth in a denture base is arrange | positioned.
また、接着された人工歯を、アクリル系レジンを用いて義歯床に本接着することで、人工歯の本接着に用いるアクリル系レジンの量を適切に調整でき、アクリル系レジンのはみ出しが抑制される。 Also, by adhering the bonded artificial tooth to the denture base using an acrylic resin, the amount of the acrylic resin used for the actual adhesion of the artificial tooth can be adjusted appropriately, and the protrusion of the acrylic resin is suppressed. The
通常、接着後の人工歯の脱落を防ぐため、義歯床のソケット部に滴下するアクリル系レジンを多めにする必要がある。しかし、多めにアクリル系レジンを滴下すると、人工歯をソケット部に配置する際にアクリル系レジンがはみ出てしまい、義歯床が汚染されるという問題が生じ、また、審美性にも問題が生じる。さらに、接着性の点から義歯床及びアクリル系レジンが同じ材料からなることが好ましいが、この場合にはみ出たアクリル系レジンを簡単に除去することができず、技工用エンジンで後処理してはみ出たアクリル系レジンを除去する必要があり、煩雑となる。 Usually, in order to prevent dropping of the artificial tooth after bonding, it is necessary to increase the amount of acrylic resin dripped onto the socket part of the denture base. However, if a large amount of acrylic resin is dripped, the acrylic resin protrudes when the artificial tooth is placed in the socket portion, causing a problem that the denture base is contaminated, and also a problem of aesthetics. Furthermore, it is preferable that the denture base and the acrylic resin are made of the same material from the viewpoint of adhesiveness. However, in this case, the protruding acrylic resin cannot be easily removed, and the post-treatment is carried out by a technical engine. It is necessary to remove the acrylic resin, which is complicated.
また、滴下するアクリル系レジンの適量は、ソケット部と人工歯との関係で決まるため、ソケットごとに滴下するアクリル系レジンの適量を予め算出することは現実的ではない。
さらに、人工歯はソケット部内で遊びがあるため、アクリル系レジンの表面張力により人工歯が浮き上がってしまい、浮き上がりを抑えた適切な位置で複数の人工歯を接着することは困難である。
Further, since the appropriate amount of the acrylic resin to be dropped is determined by the relationship between the socket part and the artificial tooth, it is not realistic to calculate in advance the appropriate amount of the acrylic resin to be dropped for each socket.
Furthermore, since the artificial tooth has play in the socket portion, the artificial tooth is lifted by the surface tension of the acrylic resin, and it is difficult to bond the plurality of artificial teeth at an appropriate position where the lift is suppressed.
一方、本実施形態に係る有床義歯の製造方法では、歯科用複合レジンを用いて人工歯を義歯床に接着した後に、アクリル系レジンを用いて義歯床に人工歯を本接着する。より具体的には、ソケット部と人工歯との隙間からアクリル系レジンを注入することで義歯床に人工歯を本接着する。このとき、歯科用複合レジンにより人工歯が義歯床に接着されているため、アクリル系レジンの注入により人工歯の浮き上がりが生じず、浮き上がりを抑えた適切な位置で複数の人工歯を本接着することができる。 On the other hand, in the method for producing a denture according to this embodiment, after the artificial tooth is bonded to the denture base using the dental composite resin, the artificial tooth is finally bonded to the denture base using the acrylic resin. More specifically, the artificial tooth is permanently bonded to the denture base by injecting an acrylic resin from the gap between the socket portion and the artificial tooth. At this time, since the artificial teeth are bonded to the denture base by the dental composite resin, the artificial teeth are not lifted by the injection of the acrylic resin, and the plurality of artificial teeth are permanently bonded at an appropriate position in which the lifting is suppressed. be able to.
さらに、本実施形態に係る有床義歯の製造方法では、接着された人工歯を、アクリル系レジンを用いて義歯床に本接着するため、アクリル系レジンの量を適切に調整することが容易であり、アクリル系レジンのはみ出しが抑制される。そのため、はみ出たアクリル系レジンによる義歯床又は人工歯の汚染が抑制され、はみ出たアクリル系レジンを除去する後処理をすることなく審美性に優れた有床義歯を製造することができる。また、後処理が不要であるため、作業時間の短縮を図ることができる。 Furthermore, in the method for manufacturing a denture according to this embodiment, since the bonded artificial tooth is permanently bonded to the denture base using an acrylic resin, it is easy to appropriately adjust the amount of the acrylic resin. Yes, the protrusion of acrylic resin is suppressed. Therefore, contamination of the denture base or artificial tooth due to the protruding acrylic resin is suppressed, and a denture with excellent aesthetics can be produced without performing post-treatment to remove the protruding acrylic resin. In addition, since no post-processing is required, the working time can be shortened.
以下、本実施形態に係る有床義歯の製造方法にて用いる義歯床、人工歯、歯科用複合レジン、アクリル系レジンについて説明する。 Hereinafter, the denture base, the artificial tooth, the dental composite resin, and the acrylic resin used in the method for manufacturing a denture according to this embodiment will be described.
（義歯床）
本実施形態にて用いる義歯床の材質としては、特に限定されないが、ＣＡＤ／ＣＡＭシステムに適している点及び市販のアクリル系樹脂製のレジン歯との接着性に優れる点から、アクリル系樹脂が好ましい。
(Denture base)
The material of the denture base used in the present embodiment is not particularly limited, but acrylic resin is used because it is suitable for a CAD / CAM system and has excellent adhesion to a resin tooth made of a commercially available acrylic resin. preferable.
ここで、アクリル系樹脂とは、アクリル酸に由来する構造単位、メタクリル酸に由来する構造単位、アクリル酸エステルに由来する構造単位、及びメタクリル酸エステルに由来する構造単位からなる群から選択される少なくとも１種を含む重合体を指す。
即ち、本明細書中におけるアクリル系樹脂は、アクリル酸、メタクリル酸、アクリル酸エステル、及びメタクリル酸エステルからなる群から選択される少なくとも１種（以下、「アクリル系単量体」ともいう）を含む単量体成分を重合して得られた重合体である。
アクリル系樹脂の原料の少なくとも一部であるアクリル系単量体は、単官能アクリル系単量体であってもよいし、多官能アクリル系単量体であってもよい。
単官能アクリル系単量体としては、アクリル酸、メタクリル酸、一分子中にアクリロイル基を１つ含むアクリル酸エステル、一分子中にメタクリロイル基を１つ含むメタクリル酸エステル、等が挙げられる。
多官能アクリル系単量体としては、一分子中にアクリロイル基を２つ以上含むアクリル酸エステル、一分子中にメタクリロイル基を２つ以上含むメタクリル酸エステル、等が挙げられる。
Here, the acrylic resin is selected from the group consisting of a structural unit derived from acrylic acid, a structural unit derived from methacrylic acid, a structural unit derived from an acrylate ester, and a structural unit derived from a methacrylic acid ester. It refers to a polymer comprising at least one species.
That is, the acrylic resin in this specification is at least one selected from the group consisting of acrylic acid, methacrylic acid, acrylic ester, and methacrylic ester (hereinafter also referred to as “acrylic monomer”). It is a polymer obtained by polymerizing the monomer component containing.
The acrylic monomer that is at least part of the raw material of the acrylic resin may be a monofunctional acrylic monomer or a polyfunctional acrylic monomer.
Examples of the monofunctional acrylic monomer include acrylic acid, methacrylic acid, acrylic acid ester having one acryloyl group in one molecule, and methacrylic acid ester having one methacryloyl group in one molecule.
Examples of the polyfunctional acrylic monomer include acrylic acid esters containing two or more acryloyl groups in one molecule, and methacrylic acid esters containing two or more methacryloyl groups in one molecule.
上記アクリル酸エステルとしては、アクリル酸アルキルエステルが好ましい。中でも、アルキルエステルの部位に含まれるアルキル基の炭素数が１〜４であるアクリル酸アルキルエステルがより好ましく、アクリル酸メチル、アクリル酸エチルが更に好ましく、アクリル酸メチルが特に好ましい。 As said acrylic ester, acrylic acid alkylester is preferable. Of these, alkyl acrylates having 1 to 4 carbon atoms in the alkyl group contained in the alkyl ester moiety are more preferred, methyl acrylate and ethyl acrylate are more preferred, and methyl acrylate is particularly preferred.
上記メタクリル酸エステルとしては、メタクリル酸アルキルエステルが好ましい。中でも、アルキルエステルの部位に含まれるアルキル基の炭素数が１〜４であるメタクリル酸アルキルエステルがより好ましく、メタクリル酸メチル、メタクリル酸エチルが更に好ましく、メタクリル酸メチルが特に好ましい。 As the methacrylic acid ester, a methacrylic acid alkyl ester is preferable. Among these, methacrylic acid alkyl esters having 1 to 4 carbon atoms in the alkyl group contained in the alkyl ester moiety are more preferred, methyl methacrylate and ethyl methacrylate are more preferred, and methyl methacrylate is particularly preferred.
また、アクリル系樹脂は、反応性や生産性の観点から、単官能アクリル系単量体を含む単量体成分を重合して得られた重合体であることが好ましい。
アクリル系樹脂は、単官能アクリル系単量体を５０質量％以上（好ましくは８０質量％以上、より好ましくは９０質量％以上、更に好ましくは９５質量％以上）含む単量体成分を重合して得られた重合体であることがより好ましい。
上記アクリル系樹脂として、特に好ましくは、メタクリル酸メチルに由来する構造単位を含む重合体であり、最も好ましくはメタクリル酸メチルの単独重合体（ポリメタクリル酸メチル、即ち、ポリメチルメタクリレート（ＰＭＭＡ））である。
上記アクリル系樹脂は、耐衝撃性の観点から、ゴムを含んでいてもよい。
ゴムの種類としては、アクリル系ゴム、ブタジエン系ゴム、ブタジエン−アクリル系ゴム、ブタジエン−スチレン系ゴム、シリコーン系ゴム、等が挙げられる。
上記アクリル系樹脂がゴムを含む場合、ゴムの種類は、適宜物性を考慮して選択すればよいが、硬度、耐衝撃性等の諸物性のバランスを考慮すると、ブタジエン系ゴム又はブタジエン−アクリル系ゴムが好ましい。
The acrylic resin is preferably a polymer obtained by polymerizing a monomer component containing a monofunctional acrylic monomer from the viewpoint of reactivity and productivity.
The acrylic resin is obtained by polymerizing a monomer component containing 50% by mass or more (preferably 80% by mass or more, more preferably 90% by mass or more, and further preferably 95% by mass or more) of a monofunctional acrylic monomer. The obtained polymer is more preferable.
The acrylic resin is particularly preferably a polymer containing a structural unit derived from methyl methacrylate, and most preferably a homopolymer of methyl methacrylate (polymethyl methacrylate, that is, polymethyl methacrylate (PMMA)). It is.
The acrylic resin may contain rubber from the viewpoint of impact resistance.
Examples of the rubber include acrylic rubber, butadiene rubber, butadiene-acrylic rubber, butadiene-styrene rubber, and silicone rubber.
When the acrylic resin contains rubber, the type of rubber may be appropriately selected in consideration of physical properties, but considering the balance of physical properties such as hardness and impact resistance, butadiene rubber or butadiene-acrylic Rubber is preferred.
義歯床は、審美性の観点から、歯肉に近い色調に着色されていてもよい。義歯床の着色には、例えば、顔料、染料、色素などを使用すればよい。 The denture base may be colored in a color tone close to gingiva from the viewpoint of aesthetics. For coloring the denture base, for example, pigments, dyes, pigments and the like may be used.
義歯床は、全部床義歯（いわゆる総入れ歯）用の義歯床であってもよいし、局部床義歯（いわゆる部分入れ歯）用の義歯床であってもよい。
また、義歯床は、上顎用義歯の義歯床であってもよいし、下顎用義歯の義歯床であってもよいし、上顎用義歯床と下顎用義歯床とのセットであってもよい。
The denture base may be a denture base for a full denture (so-called full denture) or a denture base for a local denture (so-called partial denture).
Further, the denture base may be a denture base of a maxillary denture, a denture base of a lower denture, or a set of an upper denture base and a lower denture base.
また、義歯床としては、後述する作製工程にて作製した義歯床を用いてもよく、ＣＡＤ／ＣＡＭシステムにより作製された義歯床を入手して、その義歯床を用いてもよい。 Moreover, as a denture base, the denture base produced in the preparation process mentioned later may be used, the denture base produced by the CAD / CAM system may be obtained, and the denture base may be used.
（人工歯）
人工歯としては、例えば、アクリル系樹脂製のレジン歯、硬質レジン歯などが挙げられる。また、人工歯は、充填剤等を含有していてもよい。
(Artificial teeth)
Examples of the artificial teeth include acrylic resin resin teeth and hard resin teeth. Further, the artificial tooth may contain a filler or the like.
（歯科用複合レジン）
本実施形態では、人工歯を義歯床に接着するために歯科用複合レジンが用いられる。歯科用複合レジンとしては、成形修復材料、歯冠補綴用材料、歯科用充填剤などのコンポジットレジン（修復材料）、自己接着性セメントなどが挙げられる。
(Dental composite resin)
In this embodiment, a dental composite resin is used to bond the artificial tooth to the denture base. Examples of the dental composite resin include molding restorative materials, crown prosthetic materials, composite resins (restoration materials) such as dental fillers, and self-adhesive cements.
コンポジットレジンは、例えば、マトリックスレジンとしてジメタクリレートを含み、その他に無機フィラー、シランカップリング剤などを含んでいてもよい。ジメタクリレートとしては、例えば、ビスフェノールＡジグリシジルメタクリレート（Ｂｉｓ−ＧＭＡ）、トリエチレングリコールジメタクリレート（ＴＥＧＤＭＡ）、ウレタンジメタクリレート（ＵＤＭＡ）が挙げられる。 The composite resin includes, for example, dimethacrylate as a matrix resin, and may further include an inorganic filler, a silane coupling agent, and the like. Examples of the dimethacrylate include bisphenol A diglycidyl methacrylate (Bis-GMA), triethylene glycol dimethacrylate (TEGDMA), and urethane dimethacrylate (UDMA).
自己接着性セメントとしては、例えば、マトリックスレジンとしてポリメチルメタクリレート（ＰＭＭＡ）や前述のジメタクリレートを含み、その他に接着性物質、フィラーなどを含んでいてもよい。 As a self-adhesive cement, for example, polymethyl methacrylate (PMMA) or the above-mentioned dimethacrylate is included as a matrix resin, and in addition, an adhesive substance, a filler, or the like may be included.
また、コンポジットレジンとしては、低粘度及び低弾性であるフロアブルタイプ、高粘度及び高弾性であるペーストタイプなどが挙げられる。 Examples of the composite resin include a flowable type having low viscosity and low elasticity, and a paste type having high viscosity and high elasticity.
人工歯を義歯床に接着するために用いるコンポジットレジンは、人工歯を義歯床に仮接着（仮留め）できる程度の接着力を有するものであってもよい。なお、本明細書において、仮接着とは、接着後（光重合性のコンポジットレジンでは、光硬化後）に、人工歯と義歯床との位置関係が維持される程度に人工歯が義歯床に固定され、かつソケット部と人工歯との隙間からアクリル系レジンを注入した際に人工歯と義歯床との位置関係が変わらない程度に人工歯が義歯床に固定されていることをいう。 The composite resin used for adhering the artificial tooth to the denture base may have an adhesive force enough to temporarily bond (temporarily fix) the artificial tooth to the denture base. In the present specification, temporary adhesion means that the artificial tooth is attached to the denture base to the extent that the positional relationship between the artificial tooth and the denture base is maintained after adhesion (after photocuring in the case of a photopolymerizable composite resin). It means that the artificial tooth is fixed to the denture base to the extent that the positional relationship between the artificial tooth and the denture base does not change when the acrylic resin is injected through the gap between the socket part and the artificial tooth.
また、人工歯の位置修正又は微調整をより好適に可能とする点から、光重合性のコンポジットレジンを用いることが好ましい。光重合性のコンポジットレジンを用いることにより、義歯床のソケット部に築盛されたコンポジットレジンが光照射前にて硬化しないため、取り扱い性に優れ、人工歯の位置修正又は微調整が容易である。また、光重合性のコンポジットレジンを用いることにより、硬化後の仮接着は、接着力が比較的弱いため、容易に義歯床からの人工歯の取り外しが可能であり、また、人工歯を取り外した後、義歯床のソケット部にコンポジットレジンを築盛して義歯床と人工歯との再度の仮接着が可能となる。そのため、人工歯のシェード（色調）を間違えた場合や硬化操作時に人工歯の位置にズレが生じた場合などに、硬化後であっても容易に義歯床からの人工歯の取り外しが可能となるため、再度仮接着することによる位置修正が容易である。 Moreover, it is preferable to use a photopolymerizable composite resin from the viewpoint of enabling the position correction or fine adjustment of the artificial tooth more preferably. By using the photopolymerizable composite resin, the composite resin built up in the socket part of the denture base does not harden before light irradiation, so that it is easy to handle and the position correction or fine adjustment of the artificial tooth is easy. In addition, by using a photopolymerizable composite resin, the temporary adhesion after curing has a relatively weak adhesive force, so it is possible to easily remove the artificial tooth from the denture base, and the artificial tooth was removed. Thereafter, a composite resin is built up on the socket portion of the denture base, and the temporary attachment of the denture base and the artificial tooth can be performed again. Therefore, when the shade (color tone) of the artificial tooth is wrong or when the position of the artificial tooth is shifted during the curing operation, the artificial tooth can be easily removed from the denture base even after curing. Therefore, position correction by temporary bonding again is easy.
光重合性のコンポジットレジンとしては、例えば、（メタ）アクリル酸エステルなどの重合性化合物、無機充填剤、光重合開始剤などを含むものであってもよく、さらに、重合促進剤を含むものであってもよい。 The photopolymerizable composite resin may include, for example, a polymerizable compound such as (meth) acrylic acid ester, an inorganic filler, a photopolymerization initiator, and the like, and further includes a polymerization accelerator. There may be.
また、市販のコンポジットレジンとしては、例えば、ビューティフィルＩＩ（株式会社松風製）、レボテック（株式会社ジーシー製）などが挙げられる。 Examples of commercially available composite resins include Beauty Fill II (manufactured by Matsukaze Corporation), Revotech (manufactured by GC Corporation), and the like.
（アクリル系レジン）
本実施形態では、接着された人工歯を義歯床に本接着するためにアクリル系レジンが用いられる。アクリル系レジンとしては、義歯床と人工歯との本接着が可能なものであれば特に限定されず、市販品（例えば、義歯床用レジン）を用いてもよい。
なお、本明細書において、本接着とは、有床義歯としての使用が可能な程度に人工歯が義歯床に固定されていることをいう。
(Acrylic resin)
In the present embodiment, an acrylic resin is used to permanently bond the bonded artificial tooth to the denture base. The acrylic resin is not particularly limited as long as the denture base and the artificial tooth can be bonded together, and a commercially available product (for example, a denture base resin) may be used.
In addition, in this specification, this adhesion | attachment means that the artificial tooth is being fixed to the denture base to such an extent that it can be used as a denture.
アクリル系レジンとしては、ポリマー粉とモノマー液とを混合させたものを用いてもよく、ソケット部と人工歯との隙間にアクリル系レジンを注入する場合、混合直後の低粘度のアクリル系レジンを用いることが好ましい。ポリマー粉としては、ポリメタクリル酸メチルなどのアクリル系樹脂が挙げられ、モノマー液としては、メタクリル酸メチル、メタクリル酸エチルなどのメタクリル酸エステルが挙げられる。また、アクリル系レジンは、他の成分として、４−ＭＥＴＡ（４−メタクリルオキシエチルトリメリット酸無水物）などの拡散促進モノマー、ＴＢＢ（トリ−ｎ−ブチルボラン）などの常温重合開始剤（あるいは、熱重合開始剤）、重合禁止剤、着色剤などを含んでいてもよい。 As the acrylic resin, a mixture of polymer powder and monomer liquid may be used. When the acrylic resin is injected into the gap between the socket part and the artificial tooth, a low-viscosity acrylic resin immediately after mixing is used. It is preferable to use it. Examples of the polymer powder include acrylic resins such as polymethyl methacrylate, and examples of the monomer liquid include methacrylic esters such as methyl methacrylate and ethyl methacrylate. In addition, the acrylic resin includes, as other components, a diffusion promoting monomer such as 4-META (4-methacryloxyethyl trimellitic anhydride) and a room temperature polymerization initiator such as TBB (tri-n-butylborane) (or A thermal polymerization initiator), a polymerization inhibitor, a colorant, and the like.
また、市販のアクリル系レジンとしては、例えば、アクロン（株式会社ジーシー製）、パラエクスプレスウルトラ（ヘレウスクルツァー社製）などが挙げられる。 Examples of commercially available acrylic resins include Akron (manufactured by GC Corporation) and Para-Express Ultra (manufactured by Heraeus Kultzer).
以下、本実施形態に係る有床義歯の製造方法における各工程（接着工程、作製工程）について具体的に説明する。なお、歯科用複合レジンとして、光重合性のコンポジットレジン（以下、コンポジットレジンと表記）を用いた場合について説明する。 Hereinafter, each process (bonding process, manufacturing process) in the method for manufacturing a denture according to the present embodiment will be specifically described. The case where a photopolymerizable composite resin (hereinafter referred to as composite resin) is used as the dental composite resin will be described.
（接着工程）
本実施形態に係る有床義歯の製造方法では、接着工程は、人工歯を義歯床にコンポジットレジンを用いて接着する段階を有し、必要に応じて、接着された人工歯を義歯床にアクリル系レジンを用いて本接着する段階を更に有する。
(Adhesion process)
In the method for manufacturing a denture according to this embodiment, the bonding step includes a step of bonding the artificial tooth to the denture base using a composite resin, and if necessary, the bonded artificial tooth is acrylic on the denture base. The method further includes the step of carrying out the main bonding using the system resin.
人工歯を義歯床にコンポジットレジンを用いて接着するには、具体的には、後述するように、（１）義歯床のソケット部にコンポジットレジンを築盛し、（２）コンポジットレジンが築盛されたソケット部にて、人工歯を適切な位置に配置し、（３）人工歯を適切な位置に配置した後、コンポジットレジンに光（例えば、可視光）を照射してコンポジットレジンを重合させればよい。 In order to bond the artificial tooth to the denture base using the composite resin, specifically, as described later, (1) the composite resin was built up in the socket part of the denture base, and (2) the composite resin was built up At the socket, place the artificial teeth in the appropriate position. (3) After placing the artificial teeth in the appropriate position, irradiate the composite resin with light (eg, visible light) to polymerize the composite resin. Good.
また、接着された人工歯を義歯床にアクリル系レジンを用いて本接着するには、具体的には、後述するように、（１）人工歯を義歯床に接着させた後、ソケット部と人工歯との隙間からアクリル系レジンを注入し、（２）注入したアクリル系レジンを常温で重合させる、あるいは加熱して重合させればよい。 In addition, in order to bond the bonded artificial tooth to the denture base using an acrylic resin, specifically, as described later, (1) after bonding the artificial tooth to the denture base, An acrylic resin is injected from the gap with the artificial tooth, and (2) the injected acrylic resin is polymerized at room temperature or polymerized by heating.
なお、コンポジットレジンを用いて人工歯を義歯床に接着した際に有床義歯としての使用が可能な程度に人工歯が義歯床に固定されていれば、接着された人工歯を、アクリル系レジンを用いて義歯床に本接着する処理は必須ではない。 If the artificial tooth is fixed to the denture base to the extent that it can be used as a denture base when the artificial tooth is bonded to the denture base using a composite resin, the bonded artificial tooth can be replaced with an acrylic resin. It is not essential to perform the main bonding to the denture base using the.
本実施形態における接着工程では、まず義歯床のソケット部にコンポジットレジンを築盛する。ソケット部に築盛するコンポジットレジンの量は、特に限定されないが、人工歯を義歯床に接着（仮接着）することが可能な量であり、かつコンポジットレジンが築盛されたソケット部に人工歯を配置したときにコンポジットレジンがはみ出さない程度の量であることが好ましい。 In the bonding step in the present embodiment, first, a composite resin is built up on the socket portion of the denture base. The amount of the composite resin built up in the socket is not particularly limited, but it is an amount that allows the artificial teeth to be bonded (temporarily bonded) to the denture base, and the artificial teeth are placed in the socket where the composite resin is built up. It is preferable that the amount is such that the composite resin does not protrude.
本実施形態における接着工程では、コンポジットレジンが築盛されたソケット部にて、人工歯を適切な位置に配置する。このとき、光重合性のコンポジットレジンを用いることにより、人工歯の位置修正又は微調整がより好適に可能となる。特に、人工歯の位置修正又は微調整として、咬合調整のための歯の高さ調整が可能となり好ましい。 In the bonding step in the present embodiment, the artificial teeth are arranged at appropriate positions in the socket portion where the composite resin is built up. At this time, by using a photopolymerizable composite resin, the position correction or fine adjustment of the artificial tooth can be more suitably performed. In particular, as the position correction or fine adjustment of the artificial tooth, it is possible to adjust the height of the tooth for occlusal adjustment.
人工歯を適切な位置に配置した後、コンポジットレジンに光（例えば、可視光）を照射してコンポジットレジンを重合させる。これにより、人工歯が義歯床に接着される。 After placing the artificial teeth at an appropriate position, the composite resin is polymerized by irradiating the composite resin with light (for example, visible light). Thereby, an artificial tooth is adhere | attached on a denture base.
人工歯を義歯床に接着させた後、ソケット部と人工歯との隙間からアクリル系レジンを注入する。このとき、義歯床と人工歯とが接着して固定されているため、人工歯の揺動が抑制されるとともに人工歯の浮き上がりが抑制される。 After adhering the artificial tooth to the denture base, acrylic resin is injected from the gap between the socket part and the artificial tooth. At this time, since the denture base and the artificial tooth are bonded and fixed, the swing of the artificial tooth is suppressed and the lifting of the artificial tooth is suppressed.
また、ソケット部と人工歯との隙間からアクリル系レジンの量を確認しながらアクリル系レジンを注入できるため、上記隙間からアクリル系レジンがはみ出して人工歯や義歯床の周囲が汚染されることが抑制される。 Also, since the acrylic resin can be injected while checking the amount of acrylic resin from the gap between the socket part and the artificial tooth, the acrylic resin may protrude from the gap and contaminate the surroundings of the artificial tooth and the denture base. It is suppressed.
アクリル系レジンは、ソケット部からあふれ出ない程度に表面張力で液面が盛り上がるまで、ソケット部と人工歯との隙間に注入されることが好ましい。アクリル系レジンは重合により収縮するため、外見上の問題が生じることが抑制され好ましい。 The acrylic resin is preferably injected into the gap between the socket part and the artificial tooth until the liquid level rises with surface tension to such an extent that it does not overflow from the socket part. Since acrylic resins shrink by polymerization, it is preferable to prevent appearance problems.
また、上記隙間に注入されるアクリル系レジンとしては、前述のように、ポリマー粉とモノマー液とを混合した直後の低粘度のアクリル系レジンを用いることが好ましい。 Moreover, as the acrylic resin injected into the gap, it is preferable to use a low-viscosity acrylic resin immediately after mixing the polymer powder and the monomer liquid as described above.
ソケット部と人工歯との隙間にアクリル系レジンを注入させた後、アクリル系レジンを常温で重合させる、あるいは加熱して重合させる。これにより、人工歯が義歯床に本接着され、有床義歯を製造することができる。 After the acrylic resin is injected into the gap between the socket part and the artificial tooth, the acrylic resin is polymerized at room temperature or polymerized by heating. As a result, the artificial tooth is permanently bonded to the denture base, and the denture can be manufactured.
（作製工程）
本実施形態に係る有床義歯の製造方法は、接着工程の前に、ＣＡＤ／ＣＡＭシステムにより義歯床を作製する作製工程を更に含んでいてもよい。
(Production process)
The method for manufacturing a denture according to the present embodiment may further include a production step of producing a denture base using a CAD / CAM system before the bonding step.
作製工程としては、ＣＡＤ／ＣＡＭシステムにより義歯床を作製する公知の方法であってもよく、例えば、人工歯の三次元形状を示す人工歯形状データを取得する段階と、人工歯形状データを用いて有床義歯の三次元モデルを作成する段階と、有床義歯の三次元モデルから人工歯形状データに対応する形状部分を削除することにより、義歯床の三次元形状を示す義歯床形状データを作成する段階と、義歯床形状データに基づいて義歯床を製作する段階と、を含んでいればよい。 The production process may be a known method of producing a denture base using a CAD / CAM system. For example, a step of obtaining artificial tooth shape data indicating a three-dimensional shape of an artificial tooth, and using artificial tooth shape data Creating a three-dimensional model of the denture base and deleting the shape portion corresponding to the artificial tooth shape data from the three-dimensional model of the base denture, thereby obtaining denture base shape data indicating the three-dimensional shape of the denture base. The step of creating and the step of producing the denture base based on the denture base shape data may be included.
さらに、本実施形態に係る有床義歯の製造方法は、義歯床形状データに基づいてＮＣ（numerical control）データを作成する段階を更に含み、義歯床を製作する段階において、ＮＣデータが入力されたＮＣ工作機械を用いて義歯床を製作することが好ましい。また、義歯床を製作する段階において、義歯床形状データが入力された三次元プリンタを用いて義歯床を製作してもよい。三次元プリンタは、ＣＡＤ／ＣＡＭシステムを用いて作成された形状データに基づいて、一層ずつ材料を積層することにより造形する積層造形装置である。本工程において使用し得る三次元プリンタは、光造形方式、粉末焼結積層方式、熱溶解積層方式およびインクジェット方式のいずれの方式を採用するものであってもよい。 Furthermore, the manufacturing method of the denture according to the present embodiment further includes a step of creating NC (numerical control) data based on the denture base shape data, and the NC data is input in the step of manufacturing the denture base. It is preferable to manufacture a denture base using an NC machine tool. Further, at the stage of manufacturing the denture base, the denture base may be manufactured using a three-dimensional printer in which denture base shape data is input. A three-dimensional printer is an additive manufacturing apparatus that forms an object by stacking materials one layer at a time based on shape data created using a CAD / CAM system. The three-dimensional printer that can be used in this step may employ any of a stereolithography method, a powder sintering lamination method, a heat melting lamination method, and an ink jet method.
以下、本発明の実施形態を実施例により更に具体的に説明するが、本実施形態はその主旨を越えない限り、以下の実施例に限定されるものではない。 Hereinafter, the embodiment of the present invention will be described more specifically by way of examples. However, the present embodiment is not limited to the following examples unless it exceeds the gist of the present invention.
〔実施例〕
ＣＡＤ／ＣＡＭシステムを用いて作製したアクリル系樹脂製の義歯床の人工歯ソケット部に、仮接着剤（歯科用複合レジン）として株式会社松風製のビューティフィルＩＩを各ソケット部に少量（約０．１ｇ）築盛した後、人工歯としてアクリル系樹脂製のレジン歯を、仮接着剤が築盛されたソケット部の所定の位置に配置した後、可視光照射器で３０秒照射し仮接着剤を硬化させ、義歯床に人工歯を仮接着させた。次に、人工歯の位置修正を行う必要があったため、仮接着させた人工歯を取り外し、仮接着剤の築盛以降の同様の処理を行い、義歯床に人工歯を再度仮接着させた。その後、アクリル系レジンとしてヘレウスクルツァー社製パラエクスプレスウルトラを人工歯の隙間に流し込み、アクリル系レジンを重合させて人工歯と義歯床とを接着させ、有床義歯を作製した。
〔Example〕
A small amount (about 0) of beauty fill II manufactured by Matsukaze Co., Ltd. as a temporary adhesive (composite resin for dental use) is placed on the artificial tooth socket portion of the denture base made of acrylic resin produced using the CAD / CAM system .1g) After building up, resin resin teeth made of acrylic resin as artificial teeth are placed at a predetermined position of the socket part where the temporary adhesive is built up, and then irradiated with a visible light irradiator for 30 seconds to apply the temporary adhesive. It hardened and the artificial tooth was temporarily adhered to the denture base. Next, since it was necessary to correct the position of the artificial tooth, the temporarily bonded artificial tooth was removed, the same processing after the temporary adhesive was built up was performed, and the artificial tooth was temporarily bonded again to the denture base. Thereafter, Paraexpress Ultra manufactured by Heraeus Kultzer Co., Ltd. was poured into the gap between the artificial teeth as an acrylic resin, and the acrylic resin was polymerized to bond the artificial tooth and the denture base to prepare a denture.
〔比較例〕
ＣＡＤ／ＣＡＭシステムを用いて作製したアクリル系樹脂製の義歯床の人工歯ソケット部に、アクリル系レジンとしてヘレウスクルツァー社製パラエクスプレスウルトラを滴下した後、人工歯としてアクリル系樹脂製のレジン歯を、アクリル系レジンが滴下されたソケット部の所定の場所に静置した。人工歯が浮き上がるのを防ぐため、接着剤が硬化するまで指で押さえ続け、有床義歯を作製した。
[Comparative Example]
To the artificial tooth socket part of the denture base made of acrylic resin made using a CAD / CAM system, Paraexpress Ultra made by Heraeus Kultzer Co. is dropped as an acrylic resin, and then resin teeth made of acrylic resin as artificial teeth Was allowed to stand at a predetermined location of the socket part where the acrylic resin was dropped. In order to prevent the artificial teeth from lifting, the denture was continued to be pressed with the finger until the adhesive was hardened to prepare a denture.
実施例に示す手順で有床義歯を作製した場合、仮接着剤で仮接着した人工歯は取り外しが容易であり、配列修正や誤接着があったときに取り替えて再配列することが可能であった。 When a plate denture was prepared according to the procedure shown in the example, the artificial tooth temporarily bonded with the temporary adhesive was easy to remove, and could be replaced and rearranged when there was an alignment correction or misbonding. It was.
一方、比較例に示す手順で有床義歯を作製した場合、接着剤のはみ出しが発生したり、指で人工歯を押さえ続けている間に人工歯のズレが生じたりするという問題が生じた。また、ズレ修正のため人工歯を義歯床から取り外そうと試みたが取り外すことはできなかった。 On the other hand, when a plate denture was produced according to the procedure shown in the comparative example, there were problems that the adhesive protruded or the artificial tooth was displaced while the artificial tooth was being pressed with the finger. In addition, an attempt was made to remove the artificial tooth from the denture base to correct the deviation, but it was not possible to remove it.
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